There are 2 ways to.
1. buy the books because there are always cards in the books.
2. or buy the card packs.
they are cards that you can unlock clues and replicators for.
The contest for free The 39 Clues cards expired in 2011. To get cards now, you must purchase them.
the books will only give you ten clues so the cards fill in the gaps along with the 39 clues website
a grate card code for the 39 clues is P32979TXXP
P4cmrfpmxp
I dont know but this is my agent card P2HCJ6HCXP plz add me!
this is a card that is reusable... P2W7RRJ4XP share it with ur 39 clues friends!
P3WJ46RRXPP369t2x9xpp22r4j4xpp24kgtxfxpp2mrhfjxpp29pcfnxpp2h2hjxxpp22d374xpp2hfrngrxpp2c2r4pxpp37g2nnxxpp2hfmpmxpp39ffm3pxpP3JGTT73XPP249F7TDXPp37jkkfpxp
P32d3ff9xpp2c2rd4pxpp2hfrngrxpp2hfmmpmxpp369t2x9xpp39ffm3pxpP3JGTT73XPP249F7TDXPP3F2M3NPXP
P2c2rd4pxpP22D3743XPP2HFRNGRXPp2hfmmpmxpP369T2X9XPP39FFM3PXPP3JGTT73XPP249F7TDXP
no
No